Leetcode Problem 255. Verify Preorder Sequence in Binary Search Tree

255. Verify Preorder Sequence in Binary Search Tree

Leetcode Solutions

Initialize minLimit to negative infinity and an empty stack.
Iterate over each num in preorder:
- While the stack is not empty and the top of the stack is less than num, pop from the stack and update minLimit.
- If num is less than or equal to minLimit, return false.
- Push num onto the stack.
If the entire preorder is processed without returning false, return true.

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